Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Income before income taxes by geographic area was, for the years ended December 31:

(in thousands)	2016			2015			2014
Federal	$	39,419		$	45,456		$	57,950
Foreign		(1,074	)		(1,157	)		—
	$	38,345		$	44,299		$	57,950

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The income tax provision consisted of the following for the years ended December 31:

(in thousands)	2016		2015			2014
Current
Federal	$	9,838	$	12,433		$	14,720
State		2,871		3,006			3,031
		12,709		15,439			17,751
Deferred
Federal		2,491		1,553			3,154
Foreign		481		(272	)		—
State		1,233		277			501
		4,205		1,558			3,655
Income tax expense	$	16,914	$	16,997		$	21,406

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The differences between the U.S. federal statutory tax rate and the Company’s effective tax rate for continuing operations were as follows for the years ended December 31:

	2016			2015			2014
U.S federal statutory rate		35.0	%		35.0	%		35.0	%
State income taxes, net of U.S. federal income tax expense		5.2			4.6			3.6
Provision to return adjustments, net		0.8			0.5			0.2
Tax differential on foreign earnings		2.2			0.3			—
Domestic production/manufacturing deduction		(1.9	)		(2.4	)		(2.3	)
Deferred tax adjustments, net		1.6			—			—
Non-deductible meals and entertainment		1.0			0.6			0.4
Expiration of uncertain tax positions		—			(0.4	)		—
Other income, net		0.2			0.2			—
Effective rate		44.1	%		38.4	%		36.9	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The net deferred tax assets and (liabilities) arising from temporary differences was as follows at December 31:

(in thousands)	2016			2015
Deferred income tax assets:
Self insurance reserves	$	6,670		$	7,464
Contract loss reserves		257			240
Stock-based awards		2,554			3,986
Bonus		2,908			2,497
Non-U.S. operating loss		595			373
Other		1,652			1,484
Total deferred income tax assets before valuation allowances		14,636			16,044
Less: valuation allowances		(595	)		—
Total deferred income tax assets		14,041			16,044
Deferred income tax liabilities:
Property and equipment – tax over book depreciation		(26,664	)		(25,859	)
Intangible assets – tax over book amortization		(3,592	)		(3,670	)
Non-U.S. deferred income tax liabilities		(91	)		—
Other		(2,259	)		(897	)
Total deferred income tax liabilities		(32,606	)		(30,426	)
Net deferred income taxes	$	(18,565	)	$	(14,382	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

The following is a reconciliation of the beginning and ending liability for unrecognized tax benefits at December 31:

(in thousands)	2016			2015
Balance at beginning of period	$	425		$	507
Gross increases in current period tax positions		100			62
Gross increases in prior period tax positions		—			19
Gross decreases in prior period tax positions		—			(163	)
Reductions in tax positions due to lapse of statutory limitations		(12	)		—
Settlements with taxing authorities		(243	)		—
Balance at end of period		270			425
Accrued interest and penalties at end of period		31			139
Total liability for unrecognized tax benefits	$	301		$	564